CN112233611A - Display module, preparation method and control method thereof and electronic equipment - Google Patents
Display module, preparation method and control method thereof and electronic equipment Download PDFInfo
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- CN112233611A CN112233611A CN202011139183.7A CN202011139183A CN112233611A CN 112233611 A CN112233611 A CN 112233611A CN 202011139183 A CN202011139183 A CN 202011139183A CN 112233611 A CN112233611 A CN 112233611A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the application relates to a display module, a preparation method, a control method and electronic equipment thereof, wherein the display module comprises: a substrate; a plurality of first light emitting units; a plurality of second light emitting units; the driving unit is respectively connected with the first light-emitting unit and the second light-emitting unit and is used for driving the first light-emitting unit and the second light-emitting unit to emit light in a time-sharing manner; the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals. In this application embodiment, first luminescence unit and second luminescence unit can carry out corresponding demonstration to the running state of difference, moreover, through setting up first luminescence unit and second luminescence unit in electronic equipment's the same face, can be under the prerequisite that realizes double-screen timesharing demonstration, the whole thickness of attenuate display module assembly to for the electronic equipment who carries on provides more design space, promptly, this application embodiment provides a more frivolous and higher display module assembly of flexibility.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a display module, a preparation method and a control method thereof and electronic equipment.
Background
With the rapid development of mobile communication technology, various electronic devices have more and more functions, for example, a mobile phone can send and receive short messages and make a call, and can also be used for surfing the internet, sending and receiving mails, listening to music, playing games and the like.
In order to obtain a more convenient reminding function, a designer additionally sets a display screen on the back of the mobile phone so as to remind the user of the message. However, the extra display screen leads to the fact that electronic equipment such as mobile phones are too thick and heavy, and the convenience is not enough.
Disclosure of Invention
Accordingly, it is desirable to provide a display module, a method for manufacturing the same, a method for controlling the same, and an electronic device, which are directed to the problem of excessive thickness of the electronic device.
A display module, comprising:
a substrate;
a plurality of first light emitting units;
a plurality of second light emitting units;
the driving unit is respectively connected with the first light-emitting unit and the second light-emitting unit and is used for driving the first light-emitting unit and the second light-emitting unit to emit light in a time-sharing manner;
the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals.
A preparation method of a display module comprises the following steps:
providing a substrate;
forming a plurality of driving units, a plurality of first light emitting units, and a plurality of second light emitting units on the substrate, the first light emitting units and the second light emitting units being connected to the driving units;
the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals, and the first light-emitting units and the second light-emitting units emit light in a time-sharing mode under the driving of the driving unit.
A control method of a display module comprises the following steps:
when the display module is in a first state, controlling the driving unit to drive the first light-emitting unit to emit light;
and when the display module is in a second state, controlling the driving unit to drive the second light-emitting unit to emit light.
An electronic device comprises the display module.
Above-mentioned display module assembly and preparation method, control method and electronic equipment thereof, display module assembly includes: a substrate; a plurality of first light emitting units; a plurality of second light emitting units; the driving unit is respectively connected with the first light-emitting unit and the second light-emitting unit and is used for driving the first light-emitting unit and the second light-emitting unit to emit light in a time-sharing manner; the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals. In this application embodiment, first luminescence unit and second luminescence unit can carry out corresponding demonstration to the running state of difference, moreover, through setting up first luminescence unit and second luminescence unit in electronic equipment's the same face, can be under the prerequisite that realizes double-screen timesharing demonstration, the whole thickness of attenuate display module assembly to for the electronic equipment who carries on provides more design space, promptly, this application embodiment provides a more frivolous and higher display module assembly of flexibility.
Drawings
FIG. 1 is a schematic structural diagram of a display module according to an embodiment;
fig. 2 is a schematic structural diagram of a first light emitting unit and a second light emitting unit arranged in a matrix form according to an embodiment;
fig. 3 is a schematic structural diagram of a first light emitting unit and a second light emitting unit arranged in a matrix form according to another embodiment;
FIG. 4 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a first embodiment;
FIG. 5 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a second embodiment;
FIG. 6 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a third embodiment;
FIG. 7 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a fourth embodiment;
FIG. 8 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a fifth embodiment;
FIG. 9 is a schematic structural diagram of an arrangement of micro LED sub-pixels and electronic ink pixels according to a sixth embodiment;
FIG. 10 is a circuit diagram of a driving unit according to an embodiment;
FIG. 11 is a flowchart illustrating a method for fabricating a display module according to an embodiment;
FIG. 12 is a flowchart illustrating a method for fabricating a display module according to another embodiment;
FIG. 13 is a sub-flowchart illustrating forming a plurality of driving units, a plurality of first light emitting units, and a plurality of second light emitting units on the substrate according to one embodiment;
FIG. 14 is a sub-flowchart illustrating steps of forming a plurality of the second driving circuits and a plurality of the second light emitting cells on the substrate according to one embodiment;
FIG. 15 is a schematic diagram of the device structure after step 211;
FIG. 16 is a schematic diagram of the device structure after step 212;
FIG. 17 is a schematic diagram of the device structure after step 213;
FIG. 18 is a schematic diagram of the device structure after step 214;
FIG. 19 is a schematic diagram of the device structure after step coating with phosphor;
fig. 20 is a sub-flowchart illustrating steps of another embodiment of forming a plurality of the second driving circuits and a plurality of the second light emitting cells on the substrate;
fig. 21 is a flowchart illustrating a control method of a display module according to an embodiment.
Element number description:
substrate: 10; buffer layer: 11; a gate insulating layer: 12; interlayer insulating layer: 13; a planarization layer: 14; pixel definition layer: 15; a polarizer layer: 16; cover plate: 17; a first light emitting unit: 20; electronic ink pixel: 200 of a carrier; a first electrode layer: 210; a dye particle layer: 220, 220; a second electrode layer: 230; a second light emitting unit: 30, of a nitrogen-containing gas; an active light emitting pixel: 300, respectively; micro LED sub-pixel: 310; anode: 3101; cathode: 3102; micro led sub-pixel of first color: 311; a micro LED sub-pixel of a second color: 312; a micro led sub-pixel of a third color: 313; a drive unit: 40; the first drive circuit: 410; a first transistor: 411; a second drive circuit: 420; a second transistor: 421; grid electrode: 4211; a source electrode: 4212; drain electrode: 4213; a source contact structure: 4214; a drain contact structure: 4215; an epitaxial substrate: 50; epitaxial layer: 500, a step of; native substrate: 60.
Detailed Description
To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.
Fig. 1 is a schematic structural diagram of a display module according to an embodiment, and referring to fig. 1, in the embodiment, the display module includes a substrate 10, a plurality of first light emitting units 20, a plurality of second light emitting units 30, and a driving unit 40.
The display module of the embodiment can be arranged in electronic equipment with a display function, such as a display, a tablet computer, a mobile phone, intelligent wearable equipment and the like. The material of the substrate 10 may be a hard material such as glass and plastic, or a soft material such as polyimide, and the material of the substrate 10 may be selected according to the type of the electronic device.
The display module comprises a first light emitting unit 20, a second light emitting unit 30 and a driving unit 40, wherein the first light emitting unit 20 is arranged in a first light emitting area, the second light emitting unit 30 is arranged in a second light emitting area, the first light emitting area and the second light emitting area jointly cover a display area of the display module, and the driving unit is respectively connected with the first light emitting unit 20 and the second light emitting unit 30 and is used for driving the first light emitting unit 20 and the second light emitting unit 30 to emit light in a time-sharing manner.
Specifically, the time-sharing light emission means that when the electronic device is in the first state, the first light emitting units 20 emit light, and the plurality of first light emitting units 20 jointly form a display screen of the first display screen; when the electronic device is in the second state, the second light-emitting units 30 emit light, and the plurality of second light-emitting units 30 together form a display screen of the second display screen. The first state may be a standby state, and the second state may be a display state. In this embodiment, the first light emitting unit 20 and the second light emitting unit 30 are respectively controlled by the driving unit 40, and different light emitting units can be selected to emit light according to different operating states of the electronic device, so that the first light emitting unit 20 and the second light emitting unit 30 can independently realize corresponding display functions, i.e., flexible dual-screen display is realized.
In this embodiment, the first light emitting units 20 and the second light emitting units 30 may be arranged on the same surface of the substrate 10 in a spaced-apart array. The first light emitting units 20 and the second light emitting units 30 are arranged in an array at intervals, which means that the first light emitting units 20 and the second light emitting units 30 are arranged regularly, for example, in a matrix arrangement, a regular hexagon arrangement, and the like. It should be noted that, the specific arrangement of the first light emitting units 20 and the second light emitting units 30 is not specifically limited in this embodiment, and only the first light emitting units 20 and the second light emitting units 30 need to be alternately and uniformly arranged.
It can be understood that, based on the above arrangement, the display module can be compatible with the thicknesses of the first light emitting unit 20 and the second light emitting unit 30, so as to reduce the overall thickness of the display module. For example, if the thickness of the first light emitting unit 20 is h1 and the thickness of the second light emitting unit 30 is h2, if the first light emitting unit 20 and the second light emitting unit 30 are disposed on two opposite surfaces of the display module, the first light emitting unit 20 and the second light emitting unit 30 at least need to occupy the whole thickness of h1+ h2, and based on the disposition of the present embodiment, the two light emitting units are disposed on the same surface of the substrate 10 at intervals, the whole thickness of the first light emitting unit 20 and the second light emitting unit 30 is equal to the larger one of h1 and h2, and thus, a display module with a smaller thickness can be provided. Moreover, based on the setting mode of this embodiment, the sum of the display area of first display screen and the display area of second display screen is approximately equal to the display area of display module assembly, promptly, provides a complete double screen display module assembly.
It can be understood that, when the display module of the present embodiment is installed in an electronic device, the overall thickness of the electronic device to which the display module is applied may be reduced, or a larger setting space may be provided for other hardware structures in the electronic device. For example, a battery with a larger capacity may be provided, thereby increasing the endurance of the electronic device. For example, a camera which is more responsible for the optical structure can be arranged, so that the shooting quality of the electronic equipment is improved. Namely, the display module of the embodiment has higher application flexibility, so that the display module can be adapted to more electronic devices of different types and different application scenes.
Further, the first light emitting unit 20 and the second light emitting unit 30 have different structures, and thus, the first light emitting unit 20 and the second light emitting unit 30 have different display qualities of light emitting power consumption. Specifically, the light emitting power consumption of the first light emitting unit 20 can be made smaller than the light emitting power consumption of the second light emitting unit 30, and the display quality of the second light emitting unit 30 is made better than the display quality of the first light emitting unit 20, so that the electronic device can realize better display quality with lower overall power consumption in different operation states.
In this embodiment, the display module includes: a substrate 10; a plurality of first light emitting units 20; a plurality of second light emitting units 30; a driving unit 40, respectively connected to the first light emitting unit 20 and the second light emitting unit 30, for driving the first light emitting unit 20 and the second light emitting unit 30 to emit light in a time-sharing manner; the first light emitting units 20 and the second light emitting units 30 are arranged on the same surface of the substrate 10 in an array manner at intervals. In this embodiment, the first light emitting unit 20 and the second light emitting unit 30 can perform corresponding display according to different operating states, and the first light emitting unit 20 and the second light emitting unit 30 are disposed on the same side of the electronic device, so that the whole thickness of the display module can be reduced on the premise of realizing dual-screen time-sharing display, and thus more design spaces are provided for the electronic device to be mounted, that is, the present embodiment provides a thinner and more flexible display module.
Further, the first light emitting units 20 and the second light emitting units 30 may be alternately arranged in sequence in the first direction. Fig. 2 is a schematic structural diagram of the first light emitting units 20 and the second light emitting units 30 arranged in a matrix according to an embodiment, and referring to fig. 2, the alternating arrangement in the first direction means that one second light emitting unit 30 is arranged between every two adjacent first light emitting units 20 and one first light emitting unit 20 is arranged between every two adjacent second light emitting units 30 in the first direction. In this embodiment, the first light emitting unit 20 and the second light emitting unit 30 are both bar structures, and the bar structures penetrate through the display module along a second direction, which is perpendicular to the first direction. Through the setting mode of this embodiment, can make the display module assembly have higher luminous homogeneity.
Fig. 3 is a schematic structural diagram of a first light emitting unit 20 and a second light emitting unit 30 arranged in a matrix form according to another embodiment, in this embodiment, in the second direction, a plurality of first light emitting units 20 and/or second light emitting units 30 are arranged, and the first light emitting units 20 and the second light emitting units 30 are sequentially and alternately arranged in the second direction. That is, in the present embodiment, the second light emitting unit 30 can be prevented from generating a bright stripe extending along the second direction when displaying, so as to further improve the light emitting uniformity of the display module.
In one embodiment, the first light emitting unit 20 includes at least one reflective light emitting pixel, and the second light emitting unit 30 includes at least one active light emitting pixel 300.
The reflective light emission means a manner of displaying by reflecting light in an environment by a display material in a pixel, that is, the reflective light emission does not consume power when displaying, and only needs to be powered on when switching a display screen to adjust a state or a position of the display material in the pixel, so as to display different screens. Therefore, the reflective light-emitting pixels are low in power consumption and more suitable for mobile terminals such as mobile phones and intelligent wearable devices. Moreover, due to the display principle of the reflective light-emitting pixels, when a user watches the emissive display device, the feeling of human eyes is similar to the feeling when reading paper, namely, the stronger the ambient light is, the clearer the display effect is, and the displayed brightness cannot be disturbed by the power supply current or voltage, so that the screen cannot flicker, and the like, thereby greatly reducing the fatigue of the human eyes when the display module is used for a long time. The active light emission means a mode of displaying by electrically or optically exciting the pixel to emit light, that is, the active light emission is less influenced by environmental factors, and can have a higher light emission luminance even in an environment with a lower luminance, and the active light emitting pixel 300 has a better color saturation than the reflective light emission, thereby displaying a richer screen. Therefore, by combining the reflective light-emitting pixels and the active light-emitting pixels 300, the embodiment provides a display module with good display quality in normal use, extremely low energy consumption in standby state, and good eye protection effect.
In one embodiment, the first light emitting unit 20 includes a plurality of electronic ink pixels 200. Specifically, with reference to fig. 1, the electronic ink pixel 200 includes a first electrode layer 210, a dye particle layer 220, and a second electrode layer 230, which are stacked in sequence, and when the first electrode layer 210 is closer to the substrate 10 and the second electrode layer 230 is farther from the substrate 10, the second electrode layers 230 of the electronic ink pixels 200 are electrically connected. In the present embodiment, the first electrode layers 210 of each e-ink pixel 200 are isolated from each other, and the second electrode layers 230 are electrically connected to each other and connected to a predetermined level.
The dye particle layer 220 includes light-shielding ink particles and light-reflecting ink particles. Illustratively, the light-shielding ink particles are black ink particles, and the light-reflecting ink particles are white ink particles. Specifically, the light-shielding ink particles may be black charged particles, the light-reflecting particles may be white charged particles, charges carried by the black charged particles and the white charged particles are different, and the black charged particles and the white charged particles are respectively encapsulated in a plurality of transparent microcapsules. Based on the structure of the dye particle layer 220, the black charged particles and the white charged particles can be controlled to move by using an external electric field, and finally, a stable arrangement is formed, so that the electronic ink pixel 200 has different reflective properties.
In the present embodiment, the ink particles near the second electrode layer 230 serve to reflect ambient light for display, and thus, even if the electronic ink pixel 200 displays different gray scales, by adjusting the ratio of the black ink particles and the white ink particles arranged near the second electrode layer 230. Further, the second electrode layer 230 that is conducted with each other serves as a common electrode, and the second electrode layer 230 that is isolated from each other serves as a pixel electrode, that is, the electric field between the two electrodes can be controlled by the voltage applied by the first electrode layer 210 and the second electrode layer 230, so as to control the movement of the particles carrying different charges in the dye particle layer 220, and further control the proportion of the various ink particles in the corresponding display layer at the side close to the second electrode layer 230.
Further, the first electrode layer 210 and the second electrode layer 230 may be both transparent electrodes, for example, Indium Tin Oxide (ITO), metal mesh, silver nanowires, etc., and by providing the transparent electrodes, the display brightness of the electronic ink pixel 200 may be improved and the aperture ratio may be improved, thereby providing a display module with better display quality.
In one embodiment, ink particles of multiple colors may be disposed in the dye particle layer 220, and each color of ink particles may carry charges of different quantity and different conductivity, so that by controlling the voltage applied by the first electrode layer 210 and the second electrode layer 230, the electric field between the two electrodes is controlled, and thus the movement of each ink particle in the dye particle layer 220 of each e-ink pixel 200 is controlled, and a display layer of a corresponding color is formed.
In one embodiment, a color filter is also formed on the electronic ink pixel 200. Specifically, the color filter is disposed on the surface of the second electrode layer 230 on the side away from the dye particle layer 220, and by disposing the color filter, the electronic ink pixel 200 can realize display of three primary colors, i.e., red, green, and blue, so as to realize color display of the electronic ink pixel 200.
In one embodiment, a combination of ink particles of multiple colors and a color mask may be used to provide the electronic ink pixel 200 with a more flexible display. Specifically, the voltage of the first electrode layer 210 may be controlled to concentrate the light-shielding ink particles on the side close to the second electrode layer 230 to form a light-shielding layer, so that the electronic ink pixel 200 displays black; the voltage of the first electrode layer 210 may also be controlled to make the reflective ink particles concentrate on a side close to the second electrode layer 230 to form a reflective layer, so that the electronic ink pixel 200 reflects ambient light to display white, or to display the color of a color filter corresponding to the electronic ink pixel 200; the voltage of the first electrode layer 210 may also be controlled to concentrate the dye particles on a side close to the second electrode layer 230 to form a color display layer, so that the electronic ink pixel 200 displays the color of the dye particles.
Further, the display gray scale of the electronic ink pixel 200 can be adjusted by controlling the voltage of the first electrode layer 210 to make the light-shielding ink particles and the light-reflecting ink particles mix and concentrate on the side close to the second electrode layer 230. Similarly, the plurality of first light emitting units 20 can collectively display a picture with richer colors by adjusting the display colors in the three adjacent electronic ink pixels 200.
In one embodiment, the active light emitting pixel 300 comprises: at least one micro led sub-pixel 311 of a first color, at least one micro led sub-pixel 312 of a second color, and at least one micro led sub-pixel 313 of a third color. And a shading structure is arranged between the adjacent micro LED sub-pixels 310 and the electronic ink pixel 200, so that light emitted by the micro LED sub-pixels 310 is prevented from being reflected by the electronic ink pixel 200, the color mixing problem of display is avoided, and the display quality of the display module is improved.
Fig. 4 is a schematic structural diagram of an arrangement manner of the micro led sub-pixels 310 and the electronic ink pixels 200 according to the first embodiment, which may be based on the arrangement manner of the first light emitting unit 20 and the second light emitting unit 30 according to the embodiment of fig. 2, and it should be noted that, in order to simplify the drawing, only a part of the micro led sub-pixels 310 and the electronic ink pixels 200 in the display module are shown in fig. 4, and the same simplification is performed in the embodiments of fig. 5 to 9, and no further description is given in other embodiments.
Referring to fig. 4, in the present embodiment, three first light emitting units 20 and three second light emitting units 30 are shown, a plurality of the electronic ink pixels 200 in the first light emitting units 20 are sequentially arranged along a second direction, and a plurality of the micro led sub-pixels 310 in the second light emitting units 30 are sequentially arranged along the second direction; wherein the electronic ink pixels 200 and the micro led sub-pixels 310 are alternately arranged in sequence in the first direction. Wherein the electronic ink pixel 200 and the micro led sub-pixel 310 may be aligned in a first direction. In the present embodiment, each second light emitting unit 30 includes three micro led sub-pixels 310 with different colors, for example, a red micro led sub-pixel 311, a green micro led sub-pixel 312, and a blue micro led sub-pixel 313, and the colors of the plurality of micro led sub-pixels 310 in the same column are the same, where the plurality of sub-pixels in the same column refer to a plurality of sub-pixels arranged along the first direction and aligned with each other. Based on the arrangement mode of the sub-pixels, the processing technology is simpler, and therefore the display module is higher in processing yield.
Further, the number of the electronic ink pixels 200 in the first light emitting unit 20 is the same as the number of the micro led sub-pixels 310 in the second light emitting unit 30, and the centers of the plurality of sub-pixels located in the same column are on the same straight line. In the embodiment shown in fig. 4, the size of the electronic ink pixel 200 is the same as that of the micro led sub-pixel 310, but in other embodiments, the sizes of the two sub-pixels may be different, and the specific size of each sub-pixel is not specifically limited in the present application.
Fig. 5 is a schematic structural diagram of an arrangement manner of micro led sub-pixels 310 and electronic ink pixels 200 according to a second embodiment, and referring to fig. 5, the difference between this embodiment and the embodiment of fig. 4 is that in this embodiment, colors of a plurality of micro led sub-pixels 310 located in the same column are different, and as shown in fig. 5, the plurality of micro led sub-pixels 310 with different colors are sequentially arranged in a first direction. Based on the arrangement of the embodiment, the color mixing uniformity and the brightness uniformity of the micro leds in the second light emitting unit 30 can be effectively improved, so as to avoid the occurrence of color bright stripes extending along the first direction, for example, if each red micro led needs to be lit, a plurality of red bright stripes extending along the first direction may occur by using the arrangement of the embodiment of fig. 4, thereby affecting the display quality.
Fig. 6 is a schematic structural diagram of an arrangement manner of micro led sub-pixels 310 and electronic ink pixels 200 according to a third embodiment, and referring to fig. 6, in this embodiment, a plurality of micro led sub-pixels 310 are sequentially arranged in a first direction, and a plurality of electronic ink pixels 200 are also sequentially arranged in the first direction, but the micro led sub-pixels 310 and the electronic ink pixels 200 are not aligned. This embodiment provides a new arrangement, but the display effect is similar to that of the embodiment of fig. 5.
Fig. 7 is a schematic structural diagram of an arrangement of the micro led sub-pixels 310 and the electronic ink pixels 200 according to a fourth embodiment, and referring to fig. 7, in this embodiment, the size of the electronic ink pixels 200 is different from the size of the micro led sub-pixels 310. It can be understood that the micro led sub-pixel 310 is used in the second state, in which the display quality requirement of the display module by the user is high, and the electronic ink pixel 200 is used in the first state, in which the plurality of first light emitting units 20 formed by the electronic ink pixels 200 are generally only used for time reminding or new information reminding, etc., so the requirement on the display quality is relatively low. The size of the micro led sub-pixel 310 is small, and if the electronic ink pixel 200 with the same size as the micro led sub-pixel 310 is prepared, the preparation difficulty is high, so that the size of the electronic ink pixel 200 can be increased appropriately on the premise that the functions of time reminding or new information reminding and the like can be realized, and the preparation difficulty of the display module is reduced. In the embodiment shown in fig. 7, the size of one e-ink pixel 200 is comparable to the size of three micro led sub-pixels 310 in the second direction.
Fig. 8 is a schematic structural diagram of an arrangement of the micro led sub-pixels 310 and the electronic ink pixels 200 of the fifth embodiment, and referring to fig. 8, in this embodiment, two first light emitting units 20 and two second light emitting units 30 are shown. For the reason similar to the embodiment of fig. 7 that two micro led sub-pixels 310 are arranged in the first direction in each second light emitting unit 30, the number of the electronic ink pixels 200 can be appropriately reduced to provide more micro led sub-pixels 310, so as to improve the display quality of the display module in the second state. In other embodiments, each second light emitting unit 30 may have two or more micro led sub-pixels 310 arranged in the first direction, and the colors of the plurality of micro leds in the same column in the same second light emitting unit 30 may be different.
Fig. 9 is a schematic structural diagram of an arrangement manner of micro led sub-pixels 310 and electronic ink pixels 200 according to a sixth embodiment, and in this embodiment, based on the arrangement manner of the first light emitting unit 20 and the second light emitting unit 30 according to the embodiment of fig. 3, referring to fig. 9, in this embodiment, each first light emitting unit 20 includes three micro led sub-pixels 310 with different colors, each second light emitting unit 30 includes three electronic ink pixels 200, and a plurality of sub-pixels located in the same column are aligned.
It should be understood that the above-mentioned embodiments of fig. 4 to 9 only show the schematic structural diagrams of the arrangement of a part of the micro led sub-pixels 310 and the electronic ink pixels 200, and the above-mentioned embodiments are only used for illustration and are not used to limit the protection scope of the present application, and in other embodiments, the arrangement of the plurality of micro led sub-pixels 310 is not limited to be sequentially arranged along a single direction, that is, the plurality of micro led sub-pixels 310 may also be arranged in a staggered manner.
Fig. 10 is a circuit diagram of a driving unit 40 according to an embodiment, and referring to fig. 10, in the embodiment, the driving unit 40 includes a first driving circuit 410 and a second driving circuit 420.
The first driving circuit 410 is connected to the first light emitting unit 20, and is configured to drive the first light emitting unit 20 to emit light. Specifically, the first driving circuits 410 are in one-to-one correspondence with the electronic ink pixels 200, that is, the output ends of the first driving circuits 410 are connected to the first electrode layers 210 of the electronic ink pixels 200 in one-to-one correspondence, so as to control the reflective performance of the corresponding electronic ink pixels 200.
And a second driving circuit 420 connected to the second light emitting unit 30, for driving the second light emitting unit 30 to emit light. Specifically, the second driving circuits 420 are in one-to-one correspondence with the micro led sub-pixels 310, that is, the output ends of the second driving circuits 420 are connected to the anodes 3101 of the micro led sub-pixels 310 in one-to-one correspondence, so as to control the light emitting brightness of the corresponding micro led sub-pixels 310.
The first driving circuit 410 and the second driving circuit 420 drive the corresponding first light emitting unit 20 or the second light emitting unit 30 to emit light in a time-sharing manner. In this embodiment, by controlling the first driving circuit 410 and the second driving circuit 420 to perform time-sharing driving, the corresponding first light emitting unit 20 or the second light emitting unit 30 can be controlled to emit light in a time-sharing manner.
Further, in conjunction with fig. 1, the second driving circuit 420 includes a gate electrode 4211, a source electrode 4212, a drain electrode 4213, a source contact structure 4214 and a drain contact structure 4215, so as to collectively control the micro led sub-pixel 310 to emit light. The above structure is formed in the buffer layer 11, the gate insulating layer 12, the interlayer insulating layer 13, the planarization layer 14, and the pixel defining layer 15 on the substrate 10, and further, the polarizer layer 16 and the cover plate 17 may be further formed on the pixel defining layer 15.
Further, with continued reference to fig. 10, in one embodiment, the display module further includes a first control signal line, a second control signal line, and a data signal line, and the first driving circuit 410 includes: a first transistor 411, a control end of the first transistor 411 is connected to the first control signal line, a first end of the first transistor 411 is connected to the data signal line, a second end of the first transistor 411 is connected to the first light emitting unit 20, and the first transistor 411 is used for controlling on/off of a path between the first light emitting unit 20 and the data signal line; the second driving circuit 420 includes: a second transistor 421, a control end of the second transistor 421 is connected to the second control signal line, a first end of the second transistor 421 is connected to the data signal line, a second end of the second transistor 421 is connected to the second light emitting unit 30, and the second transistor 421 is configured to control on/off of a path between the second light emitting unit 30 and the data signal line; the first transistor 411 and the second transistor 421 are turned on in a time-sharing manner. Through the setting mode of this embodiment, can effectively reduce the quantity of data signal line, reduce the use quantity that shows drive chip simultaneously to reduce display module's manufacturing cost.
Further, the above function can be realized by setting the output signal of the control signal line and the enable mode of the transistor. For example, the first transistor 411 and the second transistor 421 may have the same turn-on characteristics, and the level states of signals transmitted by the first control signal line and the second control signal line are opposite to each other. For example, in this embodiment, when in the first state, the first control signal line may be controlled to output a signal to enable the first transistor 411, and the electronic ink pixel 200 in the first light emitting unit 20 may receive a data signal from the data signal line and implement movement of charged particles according to the data signal, thereby displaying a target image; when the pixel is switched to the second state, the first control signal line may be controlled to output the signal to enable the first transistor 411, so as to switch all the electronic ink pixels 200 to the state of not reflecting the ambient light, and then the first transistor 411 is turned off, and the second control signal line may be controlled to output the signal to enable the second transistor 421, so as to enable the micro led sub-pixel 310 to display the target image.
Alternatively, for example, the first transistor 411 and the second transistor 421 may have opposite conduction characteristics, and the level states of signals transmitted through the first control signal line and the second control signal line may be the same. The display manner of this example is similar to that of the previous example, and is not repeated here.
It is understood that in other embodiments, a first data signal line and a second data signal line may be provided, the first data signal line is used for transmitting signals to the electronic ink pixel 200, the second data signal line is used for transmitting signals to the micro led sub-pixel 310, and the first transmission signal line and the second transmission signal line are output in a time-sharing manner.
With continued reference to fig. 10, the compensation circuit of 6T1C employed in the embodiments of the present application controls the micro led sub-pixel 310. Specifically, the second driving circuit 420 further includes: a third transistor T3, a third transistor T4, a third transistor T5, a third transistor T6, a third transistor T7, a third transistor T8, and a storage capacitor C.
A gate of the sixth transistor T6 is electrically connected to the second control signal line, a drain of the sixth transistor T6 is electrically connected to the bottom plate of the storage capacitor C and the drain of the third transistor T3, and a source of the sixth transistor T6 is electrically connected to the gate of the third transistor T5; a gate of the fifth transistor T5 is electrically connected to a scan signal line, and a source of the fifth transistor T5 is electrically connected to a reference voltage line; a gate of the fourth transistor T4 is electrically connected to the scan signal line, a source of the fourth transistor T4 is electrically connected to the reference voltage line, and a drain of the fourth transistor T4 is electrically connected to the gate of the third transistor; a gate of the seventh transistor T7 is electrically connected to the light emitting control signal, and the power voltage VDD is electrically connected to an upper plate of the storage capacitor C and a source of the seventh transistor T7; the drain of the third transistor T3 is electrically connected to the source of the eighth transistor T8, the gate of the eighth transistor T8 is electrically connected to the light emission control signal, the drain of the eighth transistor T8 is electrically connected to the anode 3101 of the micro led sub-pixel 310, and the cathode 3102 of the micro led sub-pixel 310 is electrically connected to the negative power supply VSS. The third transistor T3, the third transistor T4, the third transistor T5, the third transistor T6, the third transistor T7 and the third transistor T8 are all thin film transistors.
Specifically, the second driving circuit 420 is configured with a plurality of operation phases, in the first phase, a data writing and threshold voltage (Vth) storing phase, in which the light emission control signal is longer than that of the scanning signal line. The light emission control signal is at a high level, the third transistor T7 and the third transistor T8 are turned off, the scan signal line signal is at a low level, the third transistor T4, the third transistor T5 and the third transistor T6 are turned on, the third transistor T6 is turned on to short-circuit the third transistor T3 into a diode structure, and the reference voltage line generates a voltage drop | Δ V | through the third transistor T3, where the voltage drop | Δ V | is a voltage across two ends of a diode when the third transistor T3 is short-circuited into the diode structure, that is, threshold voltage (Vth) information of the third transistor T3 is captured. The second driving circuit 420 of the micro led sub-pixel 310 compensates for the threshold voltage variation of the transistor using the reference voltage line, thereby improving the accuracy of the driving circuit.
In the second phase, the micro led sub-pixel 310 emits light, wherein the light emission control signal is longer than the signal of the scan signal line. When the light emission control signal is at a low level, the third transistor T7 and the third transistor T8 are turned on, the scan signal line signal is at a high level, the third transistor T4, the third transistor T5 and the third transistor T6 are turned off, the third transistor T3 is restored to the thin film transistor structure after the third transistor T6 is turned off, and the micro led sub-pixel 310 emits light, at this time, the gate voltage Vg of the third transistor T3 is the potential stored in the storage capacitor C in the first stage, and the source 4212 voltage of the third transistor T3 is the power voltage VDD, it can be understood that the current passing through the micro led sub-pixel 310 is unrelated to the threshold voltage Vth of the third transistor T3, so that the electrical drift of the third transistor T3 is compensated.
Therefore, the second driving circuit 420 of the micro led sub-pixel 310 provided by the present embodiment adopts a 6T1C type circuit to compensate the threshold voltage of the driving transistor in each pixel, and the capture of the threshold voltage is realized through the reference voltage line, so as to facilitate the subsequent panel test and defect analysis.
Fig. 11 is a flowchart of a manufacturing method of a display module according to an embodiment, and referring to fig. 11, in the embodiment, the manufacturing method includes steps 100 to 200.
a step 200 of forming a plurality of driving units 40, a plurality of first light emitting units 20 and a plurality of second light emitting units 30 on the substrate 10, wherein the first light emitting units 20 and the second light emitting units 30 are connected with the driving units 40;
the first light emitting units 20 and the second light emitting units 30 are arranged on the same surface of the substrate 10 in an array manner at intervals, and the first light emitting units 20 and the second light emitting units 30 emit light in a time-sharing manner under the driving of the driving unit 40. In the embodiment, the display module which is thinner and more flexible can be formed through the steps. It can be understood that the display module formed by the manufacturing method of the present embodiment may refer to the foregoing embodiments of the display module, and details are not described herein.
Fig. 12 is a flowchart of a method for manufacturing a display module according to another embodiment, and referring to fig. 12, in this embodiment, before forming a plurality of driving units 40, a plurality of first light emitting units 20, and a plurality of second light emitting units 30 on the substrate 10, the method further includes:
the driving unit 40 includes a first driving circuit 410 and a second driving circuit 420, fig. 13 is a sub-flowchart of the steps of forming a plurality of driving units 40, a plurality of first light emitting units 20 and a plurality of second light emitting units 30 on the substrate 10 according to an embodiment, and referring to fig. 13, the method includes steps 210 to 220.
In one embodiment, the second light emitting unit 30 includes a plurality of micro led sub-pixels 310, and fig. 14 is a sub-flowchart illustrating steps of forming a plurality of second driving circuits 420 and a plurality of second light emitting units 30 on the substrate 10 according to an embodiment, and referring to fig. 14, the method includes steps 211 to 215.
Further, the epitaxial layer 500 is a blue micro led epitaxial layer 500, so that the micro led formed after the step 214 is a blue micro led, and a red micro led and a green micro led can be formed by coating a red conversion material and a green conversion material on the surface of the blue micro led, so as to form the micro led sub-pixels 310 with three colors. FIG. 19 is a schematic diagram of the structure of the device after step coating with phosphor.
Fig. 20 is a sub-flowchart illustrating steps of another embodiment of forming a plurality of second driving circuits 420 and a plurality of second light emitting units 30 on the substrate 10, referring to fig. 20, the second light emitting units 30 include a plurality of micro led sub-pixels 310, and the step of forming the plurality of second driving circuits 420 and the plurality of second light emitting units 30 on the substrate 10 includes steps 216 to 218.
It is understood that in step 216, the transferring order of the micro leds with different colors can be exchanged, and the order of step 216 and step 217 can also be exchanged.
Fig. 21 is a flowchart of a control method of a display module according to an embodiment, and referring to fig. 21, in the embodiment, the control method includes steps 2102 to 2104.
It should be understood that, although the steps in the flowcharts are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in each flowchart may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The embodiment of the application further provides electronic equipment, which comprises the display module, and the electronic equipment provided by the embodiment of the application has thinner thickness and better flexibility, and the specific implementation mode can refer to the implementation mode corresponding to the display module.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.
Claims (16)
1. A display module, comprising:
a substrate;
a plurality of first light emitting units;
a plurality of second light emitting units;
the driving unit is respectively connected with the first light-emitting unit and the second light-emitting unit and is used for driving the first light-emitting unit and the second light-emitting unit to emit light in a time-sharing manner;
the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals.
2. The display module of claim 1, wherein the first light-emitting unit and the second light-emitting unit are alternately arranged in sequence in the first direction.
3. The display module of claim 1, wherein the first light-emitting unit comprises at least one reflective pixel and the second light-emitting unit comprises at least one active pixel.
4. The display module of claim 3, wherein the reflective emissive pixels are electronic ink pixels.
5. The display module of claim 4, wherein the electronic ink pixels comprise a first electrode layer, a dye particle layer, and a second electrode layer, which are stacked in sequence, wherein the second electrode layers of the plurality of electronic ink pixels are electrically connected.
6. The display module of claim 3, wherein the active emissive pixels comprise:
at least one micro led sub-pixel of a first color, at least one micro led sub-pixel of a second color and at least one micro led sub-pixel of a third color.
7. The display module according to claim 6, wherein the reflective light-emitting pixels of the first light-emitting unit are sequentially arranged along a second direction, and the micro LED sub-pixels of the second light-emitting unit are sequentially arranged along the second direction;
the reflective light-emitting pixels and the micro LED sub-pixels are sequentially and alternately arranged in the first direction.
8. The display module of claim 1, wherein the driving unit comprises:
the first driving circuit is connected with the first light-emitting unit and used for driving the first light-emitting unit to emit light;
the second driving circuit is connected with the second light-emitting unit and used for driving the second light-emitting unit to emit light;
the first driving circuit and the second driving circuit drive the corresponding first light-emitting unit or the second light-emitting unit to emit light in a time-sharing manner.
9. The display module of claim 8, wherein the display module further comprises a first control signal line, a second control signal line, and a data signal line,
the first drive circuit includes: a control end of the first transistor is connected with the first control signal line, a first end of the first transistor is connected with the data signal line, a second end of the first transistor is connected with the first light-emitting unit, and the first transistor is used for controlling the connection and disconnection of a path between the first light-emitting unit and the data signal line;
the second drive circuit includes: a control end of the second transistor is connected with the second control signal line, a first end of the second transistor is connected with the data signal line, a second end of the second transistor is connected with the second light emitting unit, and the second transistor is used for controlling the on-off of a path between the second light emitting unit and the data signal line;
wherein the first transistor and the second transistor are turned on in a time-sharing manner.
10. The display module according to claim 9, wherein the first transistor and the second transistor have the same turn-on characteristic, and the first control signal line and the second control signal line transmit signals with opposite level states; or
The first transistor and the second transistor have opposite conduction characteristics, and the level states of signals transmitted by the first control signal line and the second control signal line are the same.
11. A preparation method of a display module is characterized by comprising the following steps:
providing a substrate;
forming a plurality of driving units, a plurality of first light emitting units, and a plurality of second light emitting units on the substrate, the first light emitting units and the second light emitting units being connected to the driving units;
the first light-emitting units and the second light-emitting units are arranged on the same surface of the substrate in an array mode at intervals, and the first light-emitting units and the second light-emitting units emit light in a time-sharing mode under the driving of the driving unit.
12. The method of claim 11, wherein before forming the plurality of driving units, the plurality of first light emitting units, and the plurality of second light emitting units on the substrate, further comprising:
forming a first control signal line and a second control signal line on the substrate;
the driving unit includes a first driving circuit and a second driving circuit, and the forming of the plurality of driving units, the plurality of first light emitting units, and the plurality of second light emitting units on the substrate includes:
forming a plurality of the second driving circuits and a plurality of the second light emitting units on the substrate, the second driving circuits being connected to the second control signal lines;
a plurality of the first driving circuits and a plurality of the first light emitting units are formed on the substrate, and the first driving circuits are connected to the first control signal lines.
13. The method of claim 12, wherein the second light emitting unit comprises a plurality of micro led sub-pixels, and the forming the plurality of second driving circuits and the plurality of second light emitting units on the substrate comprises:
providing an epitaxial substrate and a native substrate, wherein an epitaxial layer is formed on the epitaxial substrate, and a plurality of second driving circuits are formed on the native substrate;
bonding the epitaxial substrate and the native substrate;
stripping the epitaxial substrate and retaining the epitaxial layer bonded with the native substrate;
dividing the epitaxial layer to form a plurality of micro LEDs on the native substrate, wherein the micro LEDs correspond to the second driving circuits one by one, and anodes of the micro LEDs are connected with the second driving circuits;
and transferring the second driving circuit and the micro LED to the substrate, and connecting the control end of the second driving circuit to a second control signal line, wherein the first end of the second driving circuit is connected to a second data signal line, so as to form a plurality of micro LED sub-pixels on the substrate.
14. The method of claim 12, wherein the second light emitting unit comprises a plurality of micro led sub-pixels, and the forming the plurality of second driving circuits and the plurality of second light emitting units on the substrate comprises:
transferring a plurality of the micro LEDs of a first color onto the substrate;
transferring a plurality of the micro LEDs of a second color onto the substrate;
transferring a plurality of the micro LEDs of a third color onto the substrate;
transferring a plurality of second transistors onto the substrate;
and welding the second transistor to enable the control end of the second transistor to be connected to a second control signal line, connecting the first end of the second transistor to a data signal line, and connecting the second ends of the second transistor to the micro LEDs in a one-to-one correspondence mode.
15. A control method of a display module is characterized by comprising the following steps:
when the display module is in a first state, controlling the driving unit to drive the first light-emitting unit to emit light;
and when the display module is in a second state, controlling the driving unit to drive the second light-emitting unit to emit light.
16. An electronic device, comprising the display module according to any one of claims 1 to 10.
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| PCT/CN2021/114624 WO2022083278A1 (en) | 2020-10-22 | 2021-08-26 | Display module and preparation method and control method therefor, and electronic device |
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| CN113516915B (en) * | 2021-04-22 | 2023-12-15 | Oppo广东移动通信有限公司 | Display module, control method thereof and electronic equipment |
| CN113793907A (en) * | 2021-08-31 | 2021-12-14 | 京东方科技集团股份有限公司 | Organic light-emitting display panel, preparation method thereof and display device |
| CN113793907B (en) * | 2021-08-31 | 2023-12-22 | 京东方科技集团股份有限公司 | Organic light-emitting display panel, preparation method thereof and display device |
| CN114582234A (en) * | 2022-03-04 | 2022-06-03 | 武汉天马微电子有限公司 | Display panel, driving method thereof, display module and display device |
| CN114582234B (en) * | 2022-03-04 | 2023-10-03 | 武汉天马微电子有限公司 | Display panel, driving method thereof, display module and display device |
| CN115376460A (en) * | 2022-10-24 | 2022-11-22 | 惠科股份有限公司 | Display panel, pixel circuit and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112233611B (en) | 2022-07-12 |
| WO2022083278A1 (en) | 2022-04-28 |
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